As the popularity of using rice water for hair increases, there is growing anecdotal evidence about its benefits. But are the claims scientifically proven?

At first glance, a 2010 paper suggests they may be. The authors note that rice water may reduce surface friction and increase hair elasticity. However, the study relies on historical examples to draw unsupported conclusions.

Elsewhere, a research facility in Japan has developed an imaging technique that visualizes the strengthening effect of inositol on hair. Inositol is contained in rice water.

It is important to note that this research is published directly by a facility that may have commercial interests.

To date, the benefits of rice water for hair remain unproven. More research is needed to support anecdotal evidence about the benefits of rice water for hair.

Fermented vs. plain rice water

Some rice water advocates claim fermented rice water has more benefits than plain rice water.

According to a 2012 study, fermented substances have a higher amount of antioxidants. Antioxidants may combat hair and skin cell damage, which is why they are typical ingredients in beauty products.

To ferment rice water, follow steps 1–4 of the soaking method. Before straining, leave the rice water to stand at room temperature for up to 2 days, allowing it to ferment. Strain the rice water into a clean bowl before use.

Boiling

Another way to make rice water is by boiling the rice.

Cover ½ cup of rice with double the water typically used for cooking. Cook the rice in boiling water and strain the rice water into a clean bowl before use.